【摘要】 一般的红外调谐激光器,不仅功率低,而且谱线稳定性和功率稳定性都很差。外界条件的变化很容易造成谱线和强度的起伏。我们曾用折迭-复合腔获得高功率可调谱线CO₂激光输出。它的特点是用普通玻璃基板的红外光栅可获得80W高功率输出。本文着重讨论用这种腔怎样获得长时间的谱线稳定性和功率稳定性（功率起伏小于5％/hr）,并试图解释谱线稳定度的自动控制现象。更多还原

【Abstract】 Common tunable CW CO2 lasers only have limited output power with unstable branch and intensity due to the environment variations which will cause the branch jumping and the intensity fluctuation predominantly. But the branch and intensity stabilities are rather important for many applications as same as high power output. In a previous paper[1], we have reported that the output more than 80W with a folded compound cavity was obtained. In the present paper, we report the influences of the folded compound cavity on both the branch and intensity stabilities. With this cavity, the folded compound cavity configuration will show some frequency characteristics and compensation effect for the variation of the environmental condition, and hence long-term stability of the branch and the intensity output are obtained. We have observed that the output power fluctuation was less than 5% with branch stabilized for a relaxed environment conditions as the fluctuations of discharge current in the plasma tube within 2mA, the temperature of cooling water within 1.5? and the room temperature within 3?. We find that there will be an inherent automatism effect for stability controlling of the branch by suitable initial setting of the cavity, and this novel phenomenon is discussed and explained also.更多还原